] 
20 ‘* ENDEAVOUR” SCIENTIFIC RESULTS. 
Family CALOMETRID 4. 
Genus OrEoMETRA, A. H. Clark. 
OREOMETRA PERICALLES,! sp. nov. 
(Plate III., fig. 1.) 
Disk wanting ; centrodorsal 6 mm. in diameter. Cirri all 
missing, but cirrus-sockets 17, their ventral portion well on to 
the radials ; centrodorsal slightly convex, smooth. IBr 1 
and 2 (the axillary) united by syzygy; radials in contact 
laterally, but [Br 1 and 2 clearly separated from the adjoin- 
ing series ; each of these segments is about three times as wide 
as high and 2 has a low, obtuse distal angle; there is a 
cylindrical, blunt, spine-like tubercle (sometimes a pair) on 
the proximal margin of 1 and another on the distal margin, 
in the median line; there are 1-3 somewhat similar but 
flattened projections on each anterior margin of the axillary, 
IlBr series 4 (3-+4), or once, 3 (2+3); segments 1-3 have 
the spine-like tubercle at the median, distal margin prominent, 
while the axillary may have one somewhat smaller, on each 
side; an additional similar tubercle may be developed in 
connection with the well-marked distolateral angles. Lower 
brachials quadrilateral with conspicuous distolateral angles 
on the pinnular side; the median spine-like tubercle is also 
often developed ; after the seventh or eighth, the brachials 
tend to become triangular and the distal margins tend to 
flare, but there is no overlapping. Syzygy between 2 and 3 
on every arm, with a IIBr series, but between 3 and 4 on 
arms arising direct from the radial axillary ; second syzygy is 
somewhere between the eighth and fourteenth segments ; 
after that the syzygial interval is five or six segments. 
P, somewhat prismatic, about 7 mm. long, of about 15 
segments, curved inward, flexible, but not at all flagellate, 
rather stout throughout; the first segment is notably en- 
larged, but not the second; P», erect, and spine-like, not at 
all prismatic, about 13 mm. long, of 15 nearly cylindrical 
segments, with spiny distal margins, all but the terminal and 
2 lowest, longer than thick ; P3 very similar, perhaps a little 
longer ; P, similar, perhaps a little shorter than P3; Ps5-Pio 
similar, but successively shorter and with fewer segments, 
which have less and less spiny distal margins; Py; of 11 
segments and about 8 mm. long; succeeding pinnules dis- 
tinctly prismatic and gradually increasing to about 10 mm. 
in length. Side and covering plates well developed. Arms 
about 75 mm. long. 
1. repixaddys=Very pretty, in reference to both form and colouration. 
